I currently have a couple methods here:
public ADHelper()
{
connection = InitializeConnection();
}
private DirectoryEntry InitializeConnection()
{
DirectoryEntry ldapConnection = new DirectoryEntry("LDAP://servername.domain.com:389/DC=domain,DC=com");
ldapConnection.Username = "user"
ldapConnection.Password = "password";
ldapConnection.AuthenticationType = AuthenticationTypes.Secure;
return ldapConnection;
}
I'd like to create another method to check and see if an object exists within that domain. I'm currently doing that with the following:
public bool Exists(string objectPath)
{
bool found = DirectoryEntry.Exists("LDAP://" + objectPath);
return found;
}
But that forces me to specify an entire LDAP string. I'd like to simply extend the initial ldapConnection with an OU and maybe CN parameter within the Exists() method. Is there any way to make this happen without making the Initialize() method public?
Thanks so much!
Maybe something like this:
public bool AccountExists(string userEmail)
{
using (var root = GetLdapRoot())
{
using (var searcher = new DirectorySearcher(root))
{
searcher.Filter = string.Format("(&(objectClass=User)(mail={0}))", userEmail);
searcher.PropertiesToLoad.Add("email");
var result = searcher.FindAll();
return result.Count > 0;
}
}
}
private static DirectoryEntry GetLdapRoot()
{
return new DirectoryEntry("LDAP://DC=com"); //or whatever your root domain is. Set credentials if you need to
}
by setting a filter and being specific about what properties to load in, the search will be more efficient. By using the root as your LDAP:// string, you should be searching the entire directory.
Related
I need to be able to retrieve all records available in the index. Seems like 1000 is the limit. Is there something else I can do?
I was also facing some similar issue in one of my projects so researched over internet and got one idea that instead of using the Search API, I created a workaround scenario. What I did is I have only one attribute in my table which needs to have a pattern based search. I am sharing my code as well here.
Objectify Entity Class
#Entity
public class NewsFeed {
#Id
#Index
private Long feedID;
private String title;
private Set<String> titleKeywords;
// getters and setter
}
Logic for storing the keyword in the same table. I have split all the title words for my entity into keywords, and stored them in a Set Object.
NewsFeed newsFeed = new NewsFeed();
newsFeed.setTitle(title);
newsFeed.setTitleKeywords(getKeywordsSet(newsTitle));
// save entity here
Method for extracting keywords from title(field to be searched)
public Set<String> getKeywordsSet(String title) {
Set<String> keywords = new HashSet<String>();
String titleNews = title.toLowerCase();
String[] array = titleNews.split(" ");
for (int i = 0; i < array.length; i++) {
// replacing all special characters here
String word = array[i].replaceAll("\\W", "");
keywords.add(word);
}
return keywords;
}
Listing all the feeds from our DB, and finally matching the parameter to be searched, by the logic below.
public List<NewsFeed> getFilterJsonArray(String param){
// Listing all the objects of entity
List<NewsFeed> list = newsFeedDao.listOrderedFeeds();
List<NewsFeed> matchedObject = new ArrayList<NewsFeed>();
for (NewsFeed newsFeed : list) {
/**
* main logic for pattern matched keywords
**/
if (isAnElementInSet(newsFeed.getTitleKeywords(), param.toLowerCase())) {
matchedObject.add(newsFeed);
}
}
return matchedObject;
}
public boolean isAnElementInSet(Set<String> keywords, String param) {
String []params = param.split(" ");
if (keywords.size() > 0) {
for(String splittedParam : params){
if (keywords.contains(splittedParam)) {
return true;
} else{
for (String keyword : keywords) {
if(keyword.contains(splittedParam)){
return true;
}
}
return false;
}
}
return true;
}else{
return false;
}
}
I know this cannot be the best solution for searching things but this solution worked very fine for me. I just shared it here so as to get improvements in this logic as well.
I have a Setting.cs file containing the info
[Serializable]
public class Setting
{
public Setting() {}
public String defaultAlertTone = Path.GetDirectoryName(Application.ExecutablePath) + "\\Sounds\\applause-2.wav";
}
and my settingsForm retrieving the info through this code
Setting settingObject;
public SoundPlayer player;
public settingsForm(backgroundForm backgroundFormObject)
{
InitializeComponent();
this.backgroundFormObject = backgroundFormObject;
settingObject = backgroundFormObject.getSetting();
}
private void InitializeSound()
{
// Create an instance of the SoundPlayer class.
player = new SoundPlayer();
player.SoundLocation = settingObject.defaultAlertTone;
// Listen for the LoadCompleted event.
player.LoadCompleted += new AsyncCompletedEventHandler(player_LoadCompleted);
// Listen for the SoundLocationChanged event.
player.SoundLocationChanged += new EventHandler(player_LocationChanged);
}
Why is it that every time I run the app, there would be a null reference exception on the
player.SoundLocation = settingObject.defaultAlertTone;
the backgroundFormObject.getSetting(); is just a method to retrieve the setting object. the code for it are as follows
Setting settingObj = new Setting();
public Setting getSetting()
{
return settingObj;
}
The reasons could be
InitializeSound() is somehow running before settingsForm (not likely, but this would make the settingObject not initialized and refer to null).
If this is the complete code for Setting class, i don't see how calling new Setting() anywhere would make a difference. So use Setting settingObject = new Setting(); when you first define this property in the settingsForm class.
It is not the settingObject which is null.
Whats the best way to save variables like userid that is stored and reachable from different pages in WP7.
There's the querystring method, but can be kind of a pain to implement.
When navigating, pass the parameter like a HTTP querystring.
Then, on the otherside, check if the key exists, and extract the value. The downside of this is if you need to do more than 1, you need to type it in yourself, and it only supports strings.
So to pass an integer, you'd need to convert it. (And to pass a complex object, you need to take all the pieces you need to recompile it on the other side)
NavigationService.Navigate(new Uri("/PanoramaPage1.xaml?selected=item2", UriKind.Relative));
protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
string selected = String.Empty;
//check to see if the selected parameter was passed.
if (NavigationContext.QueryString.ContainsKey("selected"))
{
//get the selected parameter off the query string from MainPage.
selected = NavigationContext.QueryString["selected"];
}
//did the querystring indicate we should go to item2 instead of item1?
if (selected == "item2")
{
//item2 is the second item, but 0 indexed.
myPanorama.DefaultItem = myPanorama.Items[1];
}
base.OnNavigatedTo(e);
}
Here's a sample app that uses a querystring.
http://dl.dropbox.com/u/129101/Panorama_querystring.zip
A easier (and better) idea is to define a variable globally, or use a static class. In App.xaml.cs, define
using System.Collections.Generic;
public static Dictionary<string,object> PageContext = new Dictionary<string,object>;
Then, on the first page, simply do
MyComplexObject obj;
int four = 4;
...
App.PageContext.Add("mycomplexobj",obj);
App.PageContext.Add("four",four);
Then, on the new page, simply do
MyComplexObj obj = App.PageContext["mycomplexobj"] as MyComplexObj;
int four = (int)App.PageContext["four"];
To be safe, you should probably check if the object exists:
if (App.PageContext.ContainsKey("four"))
int four = (int)App.PageContext["four"];
You may use an App level variable (defined in App.xaml.cs) and access it from anywhere within your app. If you want to persist, shove it into Isolated Storage and read it on App launch/activate. There are helpers available to JSon serialize/deserialize your reads/writes from the Isolated Storage.
Check out Jeff's post (here) on tips to use Isolated Storage.
Hope this helps!
Well "best" is always subjective, however, I think an application service is a good candidate for this sort of thing:-
public interface IPhoneApplicationService : IApplicationService
{
string Name {get; set;}
object Deactivating();
void Activating(object state);
}
public class AuthenticationService : IPhoneApplicationService
{
public static AuthenticationService Current {get; private set; }
public void StartService(ApplicationServiceContext context)
{
Current = this;
}
public void StopService()
{
Current = null;
}
public string Name {get; set;}
public object Deactivating()
{
// Return an serialisable object such as a Dictionary if necessary.
return UserID;
}
public void Activating(object state)
{
UserID = (int)state;
}
public int UserID { get; private set; }
public void Logon(string username, string password)
{
// Code here that eventually assigns to UserID.
}
}
You place an instance of this in your App.xaml:-
<Application.ApplicationLifetimeObjects>
<!--Required object that handles lifetime events for the application-->
<shell:PhoneApplicationService
Launching="Application_Launching" Closing="Application_Closing"
Activated="Application_Activated" Deactivated="Application_Deactivated"/>
<local:AuthenticationService Name="AuthServ" />
</Application.ApplicationLifetimeObjects>
Now you do need to tweak the App.xaml.cs:-
private void Application_Activated(object sender, ActivatedEventArgs e)
{
var state = PhoneApplicationService.Current.State;
foreach (var service in ApplicationLifetimeObjects.OfType<IPhoneApplicationService>())
{
if (state.ContainsKey(service.Name))
{
service.Activating(state[service.Name]);
}
}
}
private void Application_Deactivated(object sender, DeactivatedEventArgs e)
{
var state = PhoneApplicationService.Current.State;
foreach (var service in ApplicationLifetimeObjects.OfType<IPhoneApplicationService>())
{
if (state.ContainsKey(service.Name))
{
state[service.Name] = service.Deactivating();
}
else
{
state.Add(service.Name, service.Deactivating());
}
}
}
You can now access you UserID anywhere in your app with:-
AuthenticationService.Current.UserID
This general pattern can be used to maintain seperation of key application wide services (you don't load a whole bunch of incohesive properties into your App class). It also provides the hooks for maintaining state between activations which is essential.
I'm trying to add new object to existing organisational unit in Active Directory. Following code is used to do this.
It runs without errors. But new object is not created after this. Please advise what I'm doing wrong here.
using System.DirectoryServices;
using System.DirectoryServices.ActiveDirectory;
namespace TestAdObjectCreation
{
class Program
{
static void Main(string[] args)
{
DirectoryEntry root = new DirectoryEntry("LDAP://servername/OU=Services,OU=PCX,DC=q2q,DC=xenyq,DC=com", "Administrator", "pass");
DirectoryEntry newItem = root.Children.Add("test_node", "valid_schema_class_name");
root.CommitChanges();
root.Close();
root.Dispose();
}
}
}
What kind of object are you trying to create??
First of all, all LDAP object always have a prefix, DC= for domain component, OU= for organizational unit, CN= for common name.
Also, many LDAP objects have minimal requirements for what they need to be considered valid; e.g. a user or a group must have a unique samAccountName.
So again - what are you trying to create??
If you wrap your creation code into a try..catch - do you get any exceptions? If so - what are they??
static void Main(string[] args)
{
DirectoryEntry root = new DirectoryEntry("LDAP://servername/OU=Services,OU=PCX,DC=q2q,DC=xenyq,DC=com", "Administrator", "pass");
try
{
DirectoryEntry newItem = root.Children.Add("CN=test_node", "valid_schema_class_name");
root.CommitChanges();
}
catch(Exception exc)
{
string error = exc.GetType().FullName + ": " + exc.Message;
}
}
I get the above error sometimes during the read. The exception originates from ASP.NET SqlDataReader whenever you try to read data before calling the Read() method. Since EF does all these internally, I am wondering what else can cause this error. could it be network (or) db connectivity?
thanks
Additional Bounty Info (GenericTypeTea):
I've got the same error after upgrading to EF Code First RC (4.1):
"Invalid attempt to read when no data
is present"
This is the code in question:
using (var context = GetContext())
{
var query = from item in context.Preferences
where item.UserName == userName
where item.PrefName == "TreeState"
select item;
// Error on this line
Preference entity = query.FirstOrDefault();
return entity == null ? null : entity.Value;
}
The table structure is as follows:
Preference
{
Username [varchar(50)]
PrefName [varchar(50)]
Value [varchar(max)] Nullable
}
The table is standalone and has no relationships. This is the DbModelBuilder code:
private void ConfigurePreference(DbModelBuilder builder)
{
builder.Entity<Preference>().HasKey(x => new { x.UserName, x.PrefName });
builder.Entity<Preference>().ToTable("RP_Preference");
}
Exactly the same code works perfectly in CTP5. I'm guessing this is an RC bug, but any ideas of how to fix it would be appreciated.
This error occurs when there is a large amount of data in the RC release. The difference between the RC and CTP5 is that you need to specify the [MaxLength] property that contains a large amount of data.
Are you re-using contexts? I would guess this is happening as a result of something you are doing within GetContext
If GetContext() provides a stale context, in which the DataReader is closed/corrupted, I could see the above happening.
I cannot reproduce your problem on EF4.1 RC1.
POCO:
public class Preference
{
public string UserName { get; set; }
public string PrefName { get; set; }
public string Value { get; set; }
}
Context:
public class PreferenceContext : DbContext
{
public DbSet<Preference> Preferences {get;set;}
public PreferenceContext()
: base("Data Source=localhost;Initial Catalog=_so_question_ef41_rc;Integrated Security=SSPI;") {
}
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
ConfigurePreference(modelBuilder);
base.OnModelCreating(modelBuilder);
}
private void ConfigurePreference(DbModelBuilder builder)
{
builder.Entity<Preference>().HasKey(x => new { x.UserName, x.PrefName });
builder.Entity<Preference>().ToTable("RP_Preference");
}
}
My little Console App:
class Program
{
static void Main(string[] args)
{
string userName = "Anon";
for (int i = 0; i < 10000; i++)
{
var p = GetPreference(userName);
}
}
private static string GetPreference(string userName)
{
using (var context = new PreferenceContext())
{
var query = from item in context.Preferences
where item.UserName == userName
where item.PrefName == "TreeState"
select item;
// Error on this line
Preference entity = query.FirstOrDefault();
return entity == null ? null : entity.Value;
}
}
}
I do 10,000 reads, and no error. You will need to post more complete code to continue.
Increase the CommandTimeout on the context.
I had the same issue with EF4 - In my case I was (trying to) return the list of entities within the using{} section. This is the same as you are doing in your question:
return entity == null ? null : entity.Value;
} // end using
I moved the return to after the } and it worked.
I think I had the problem because the code was in a function which had already queried the database in another using block, I suspect the table was locking but not reporting the error, ending the using block before the return released the database lock.
Steve